Atmosphere/fusee/fusee-secondary/src/main.c

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/*
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* Copyright (c) 2018-2019 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
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#include <stdlib.h>
#include <string.h>
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#include <errno.h>
#include <malloc.h>
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#include "utils.h"
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#include "panic.h"
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#include "exception_handlers.h"
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#include "loader.h"
#include "chainloader.h"
#include "stage2.h"
#include "nxboot.h"
#include "console.h"
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#include "fs_utils.h"
#include "nxfs.h"
#include "gpt.h"
#include "display/video_fb.h"
#include "sdmmc/sdmmc.h"
#include "lib/log.h"
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extern void (*__program_exit_callback)(int rc);
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static __attribute__((__aligned__(0x200))) stage2_args_t g_stage2_args_store;
static stage2_args_t *g_stage2_args;
static bool g_do_nxboot;
static void setup_env(void) {
/* Initialize the display and console. */
if (console_init() < 0) {
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generic_panic();
}
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/* Set up exception handlers. */
setup_exception_handlers();
/* Initialize the file system by mounting the SD card. */
if (nxfs_init() < 0) {
fatal_error("Failed to initialize the file system: %s\n", strerror(errno));
}
}
static void cleanup_env(void) {
/* Terminate the file system. */
nxfs_end();
}
static void exit_callback(int rc) {
(void)rc;
if (g_do_nxboot) {
/* TODO: halt */
} else {
relocate_and_chainload();
}
}
/* Allow for main(int argc, void **argv) signature. */
#pragma GCC diagnostic ignored "-Wmain"
int main(int argc, void **argv) {
loader_ctx_t *loader_ctx = get_loader_ctx();
/* Check argc. */
if (argc != STAGE2_ARGC) {
generic_panic();
}
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g_stage2_args = &g_stage2_args_store;
memcpy(g_stage2_args, (stage2_args_t *)argv[STAGE2_ARGV_ARGUMENT_STRUCT], sizeof(*g_stage2_args));
/* Check stage2 version field. */
if (g_stage2_args->version != 0) {
generic_panic();
}
/* Override the global logging level. */
log_set_log_level(g_stage2_args->log_level);
/* Initialize the boot environment. */
setup_env();
print(SCREEN_LOG_LEVEL_DEBUG | SCREEN_LOG_LEVEL_NO_PREFIX, u8"Welcome to Atmosphère Fusée Stage 2!\n");
print(SCREEN_LOG_LEVEL_DEBUG, "Stage 2 executing from: %s\n", (const char *)argv[STAGE2_ARGV_PROGRAM_PATH]);
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/* Load BCT0 from SD if needed. */
if (strcmp(g_stage2_args->bct0, "") == 0) {
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uint32_t bct_tmp_buf[sizeof(g_stage2_args->bct0) / sizeof(uint32_t)] = {0};
if (!read_from_file(bct_tmp_buf, sizeof(bct_tmp_buf) - 1, "atmosphere/BCT.ini")) {
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fatal_error("Failed to read BCT0 from SD!\n");
}
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memcpy(g_stage2_args->bct0, bct_tmp_buf, sizeof(bct_tmp_buf));
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}
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/* This will load all remaining binaries off of the SD. */
load_payload(g_stage2_args->bct0);
print(SCREEN_LOG_LEVEL_INFO, "Loaded payloads!\n");
g_do_nxboot = (loader_ctx->chainload_entrypoint == 0);
if (g_do_nxboot) {
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print(SCREEN_LOG_LEVEL_INFO, "Now performing nxboot.\n");
/* Start boot. */
uint32_t boot_memaddr = nxboot_main();
/* Terminate the boot environment. */
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cleanup_env();
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/* Finish boot. */
nxboot_finish(boot_memaddr);
} else {
/* TODO: What else do we want to do in terms of argc/argv? */
const char *path = get_loader_ctx()->file_paths_to_load[get_loader_ctx()->file_id_of_entrypoint];
print(SCREEN_LOG_LEVEL_INFO, "Now chainloading.\n");
g_chainloader_argc = 1;
strcpy(g_chainloader_arg_data, path);
/* Terminate the boot environment. */
cleanup_env();
}
/* Finally, after the cleanup routines (__libc_fini_array, etc.) are called, chainload or halt ourselves. */
__program_exit_callback = exit_callback;
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return 0;
}